如何防止Hibernate在PUT web请求中将列值更新为null？

@Entity
public class User {
    @Id
    private Long id;

    @NotNull
    private String name;

    // getters and setters
}

@Entity
@DynamicUpdate
public class User {
    @Id
    private Long id;

    private String name;

    // getters and setters
}

@RestController
@RequestMapping("/users")
public class UserController {
    @PutMapping("/{id}")
    public User updateUser(@PathVariable Long id, @RequestBody User user) {
        // 根据id从数据库中获取原始用户信息
        User originalUser = userRepository.findById(id).orElseThrow(() -> new NotFoundException("User not found"));

        // 更新非null属性
        if (user.getName() != null) {
            originalUser.setName(user.getName());
        }

        // 执行更新操作
        User updatedUser = userRepository.save(originalUser);

        return updatedUser;
    }
}